About Iomega Bernoulli Drives

Updated: 2026

Software is available for the Macintosh if you need it and only works with Mac OS versions 7 thru 9, (download it, here). PC Exchange will work too! This is a control panel inside the control panels folder.

Jumper Settings for 90MB, 150MB and 230MB SCSI Bernoulli Insider

Picture of jumper block on Bernoulli 90/150/230 series

Click here for jumper settings and ID numbers

Bernoulli 150, 90 & 44 Product Information.
Is it really faster than a Zip100 & more reliable?
How many Zip disks have you thrown away?

What is it? And is it faster than the Zip100?

The Bernoulli 90, or Bernoiulli 90 PRO is a 5.25 inch removable disk drive.
The Bernoulli 150 can read & write 150 & 90MB disks.
The Bernoulli 230 can read & write 230 & 150 & 90MB disks.
This drive is a SCSI device that may be used with both PC and Macintosh systems.
The Bernoulli 90 will read and write to any Iomega 90MB disk, and is read-only compatible with 44MB disks.
The Bernoulli 44 is an older version of the above that can read and write to 44MB disks.

The Bernoulli 90 MB and 44 MB drive is available in the following configurations:

Insider 90 PRO ,Insider 44. An internal model for the PC that uses an internal 5-inch drive bay.
Transportable 90 PRO, Transportable 44. A single external drive that supports SCSI daisy-chaining or our Parallel Port Inerface (PPA3).
Dual 90 PRO, Dual 44. A dual external drive that supports SCSI daisy-chaining.

Note that both the Transportable and Dual models provide switchable SCSI ID and termination.

For additional information please select any of the following:

Drive Requirements:

Technical Specifications:

Drive Requirements.

Operating System:

PC: MSDOS version 4.x or higher.
Macintosh: System 6.0.5 or higher.

Interface-PC:

Iomega PC800 or newer for ISA systems.
Iomega PC4 for PS/2 (MCA) systems.
Iomega PPA-3 (parallel port connection)
Generic SCSI II controller with Adaptec compatible ASPI manager.

Interface-Mac:

None. -SCSI controller is built in to the Mac.

Driver software and Utilities:

PC: Iomega OAD or Iomega SCSI drivers.
Mac: Iomega 3.5.x driver (for system 7.5: Iomega driver 3.5.3)

Technical Specifications.

Drive Performance:

Data Transfer Rate: up to 20 Mbits/sec Disk to Buffer: up to 13.33 Mbits/sec Effective Access Time: 18 msec.

Drive Reliability

Mean Time Between Failure: 75,000 hours

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